壳聚糖颗粒协同表面活性剂高效乳化分散海洋溢油

As an effective approach to quickly respond to oil spills, chemical dispersion is applied in the marine environment worldwide. However, due to the toxicity and limited biodegradation of traditional chemical dispersants, it is necessary to develop environmental-friendly oil spill dispersants as substitutes. In this research, chitosan microparticles(CS-TPP) were synthesized by ionic gel technology and compounded with nonionic surfactant Tween 80, anionic surfactant bis(2-ethylhexyl) sulfosuccinate sodium salt(AOT) and organic solvent dipropylene glycol butyl ether(DPNB) to develop a novel oil spill dispersant with lower toxicity and greater biodegradability. Compared with the emulsification performance of the simulated Corexit 9500A, this oil spill dispersant exhibited better emulsification effect and higher emulsion stability, with emulsification ratios of 72.3%±1.6% after 30 s and 35.6%±2.6% after 10 min of the dispersed emulsion. Furthermore, the mechanism by which seawater temperature and NaCl concentration affect emulsion stability was elaborated. And the mechanism of the synergistic emulsification of CS-TPP particles and surfactants on the oil spill was revealed. This novel oil spill dispersant can significantly reduce the environmental and biological hazards of pure chemical dispersants. It is expected to be a feasible alternative for oil spill remediation.